Wrench



c. M. JONES. I

WRENCH. APPLICATION FILED MAR. 8, 1920.

1,348, 1 43 Patented July 27, 1920.

anmautoz UNITED STATES CLAYTON m. JONES, or JAMESTOWN, New YORK.

WRENCH.

Application filed March 8,

To all whom it may concern:

Be it known that I, CLAYTON M. JoNns, a citizen of the United States, residing at the city of Jamestown, in thecounty of Chautauqua and State of New York, have invented certain new and useful Improvements in Wrenches, of which the following, taken in connection with the accompanying drawings, is a specification.

The invention relates to improvements in adjustable jaw wrenches for bolt nuts; and the object of the improvement is to provide a simple adjustable jaw wrench of great strength which fits the faces of angular nuts and has a simple and positive adjustment which is attained with a minimum amount of friction; and the invention consists in the combination and arrangement of the parts as shown in this specification and the accompanying drawings.

- In the drawings, Figure 1 is a side elevation of the wrench with the jaws open to their widest adjustment, a portion of the wrench head being broken away to show the construction of the adjusting mechanism for the movable jaw. Fig. 2 is an edgewise elevation of the fixed jaw showing the double or figure 8 shaped orifice in the same. Fig. 3' is an edgewise elevation of the front ormovable jaw side of the wrench showing the head of the adjusting screw. Fig. 4 is a detail perspective view of the movable jaw removed from the wrench head. Fig. 5 shows perspective views of the adjusting knurled nut and the set screw for attaching said nut on the adjusting screw; and Fig. 6 is a side elevation of the adjusting screw removed from the wrench head. I 1

Like characters of reference refer to corresponding parts in the several views.

The wrench belongs to the class ofadjustable aw wrenches in which one of the jaws is a fixed jaw integral with the head and handle of the wrench, and the other is adjustably placed opposite said fixed jaw, the head having a slot wherein said movable jaw is slidably retained.

Thewrench consists of a handle 10 which is preferably placed at an angle to the faces of the jaws instead of in line therewith so that a longer sweep is given to the wrench handle in turning a bolt nut.

The numeral 11 designates the wrench head which has the fixed jaw 12 thereon, the inner face of the jaw adjacent the head hav- Specification of Letters Patent.

Patented July 27, 1920.

1920. Serial No. 864,166.

ing angular braces 13 to strengthen said fixed jaw, said braces 13 being preferably at an angle which conforms to one side of a hexagonal nut thereby more closely fitting said hexagonal nut and enabling the user of the wrench to exert a greater power upon said'nut The braces 13 extend from the fixed jaw 12 onto the wrench head 11 each side of a central slot 145. I

The wrench head 11 has a double or figure 8 shaped: opening 15 in crosswise section, which is usually formed by drilling two similar sized parallel holes therethrough so that said holes open into one another on their adjacent sides. The holes 15 are diametrall Y larger than the central slot 14, to holdthe movable jaw 16 therein. The movable jaw 16 has a toothed extension 1'7 which is slidably receivable within the slot 14 and figure 8 shaped hole 15. The jaw 16 comprises the face: portion 18, the extension 17 on the under side of the jaw and the toothed rack 19 on the lower portion of the extension 17. Said extension 17 slidably fits within the round upper portion or barrel of the figure 8 shaped hole 15 and extends down into the lower portion suflicicntly to intermesh with a screw 20 which revolubly fits within the smooth bore lower portion or barrel of the double barreled or figure 8 shaped opening'15.

A crosswise opening 21 is provided in the wrench head within which the knurled nut 22 fits when attached by means of a set screw 23 on the adjusting screw 20 within said opening 21. The spiral thread 24 of the screw 20 preferably inclines away from its slotted end 29, that is, the side 30 toward said slotted end 29 is made at an incline while the side 31 toward the unslotted end 32 is straight sided or substantially at right angles to the axis of the screw, and the teeth 25 in the'rack 19 on the under side of the removable jaw 16 are similarly shaped to conform to the opening between the threads screw 23 is inserted in the hole 27, in the nut. 1

22, thereby keying said nut 22 in a fixed poder side of the extension 17 on the movable jaw 16. An angular cut 28 is provided in said under side of the extension 17 so that said aw 16 can move out over the nut 22 as the jaw slidably moves back and forth in thewrench head 11, and the diameter of the nut 22 and the cut-away portion 28 are so proportioned to one another that said cut-away portion of the jaw 16 presses against the side of the nut 22 when said jaw 16 is in the extreme extended position as shown in Fig. 1, thus giving added strength to said jaw at its extreme extension when it is in greatest need of strength.

The extension 17 slidably fits within the slot 14 and the larger opening 15, and is preferably formed with an opposite angularly inclined brace 26 which slidably fits between the braces 13 and conforms to a face of a hexagonal nut adjacent to the face engaged by said braces 13. The screw 20 is threaded throughout its length with the exception of a short head portion with astrong coarse thread, and the rack or toothed portion 19 has as many teeth as possible but not extending beyond the wrench head 11 when in the extreme open or in the closed positions.

It is now apparent that the wrench is easily assembled, and when so assembled, the rotation of the screw 20 by means of the knurled nut 22 causes the movable aw 16 to move backward and forward holding and bracing said jaw firmly in position because of the comparativelylong rack 19 thereon and at all positions of the movable jaw and adjusting mechanism therefor. The wrench head i self-contained, that is, the screw 20 does not move from its rotatable position in the smooth lower portion of the double barreled opening 15. The removable jaw 16 is stopped by the fixed jaw 12 in the closed position, the'extension 17 just extending to the mouth of the upper portion of the opening 15 when in said closed position and said movablejaw 16 is stopped by the knurled nut 22 in the extended position as hereinsufiiciently wide to permit the insertion of before stated.

It is apparent that the central slot 14 can be easily cut with a power hack saw the width of said saw, equaling the width of the slot 14. The double barreled opening 15 is said saw therein for the accurate cutting of said slot 14 so that the extension 17 moves backward and forward in said slot 14 and opening15 with a minimum amount of friction. The greatest reduction of friction, however, is attained by the non-threading of the lower portion of the opening 15, within which the screw'20 is rotatably mounted, said screw 20 only engaging the rack teeth 19 to move the jaw 16 backward and forward within the slotted head, yet supporting said rack 19 throughout its entire length. The enlargement on said extension 17 which fits within the upper portion of said opening 15 holds the jaw 16 firmly in line so that the force required to turn the screw 20 is reduced to the minimum in adjusting the movable jaw 16. The knurled nut 22 fixes and holds the screw 20 in position in said lower portion of the opening 15 so that it cannot move out of the position shown, yet rotates with great ease and a strong leverage.

I claim as new:

1. In a wrench, a head having a fixedjaw and having a double barreled opening the barrels of which are superposed and connected by a slot, an adjustable jaw having an extension slidable and conformably fitted in the upper of the barrels and in the slot and having rack teeth on its lower edge which extend downwardly into theftop of the lower barrel, a screw fitting in the lower barrel so as to be guided thereby and in mesh with the rack teeth, and means to rotate the screw, said lower barrel being formed so that its circular wall engages and guides the screw throughout substantially the length of the latter the screw being of equal diameter throughout and the lower barrel also being of equal diameter through-- out. ,7

2. In a wrench, a head having a fixedjaw and having a double barreled opening the barrels of which are superposed and connected by a slot, an adjustable jaw having an extension slidable and conformably fitted in the upper of the barrels and in the slot and having rackteeth on .its lower edge which extend downward-1y into the top of the lower barrel, a screw fitting in the lower barrel so as to be guided thereby and in. mesh with the rack teeth, and a nut attached to the screw andreceived in a transverse slot formed in the head, the nut having'a bore of a diameter substantially equal to. that of the screw, said lower barrel being formed so that its circular wall engages and guides the screw throughout substantially the length of the latter the screw being of equal diameter throughout and the lower barrel also being of equal diameter throughout;

In testimony whereof I haveaffixed my signature in the presence of two witnesses. CLAYTON M. JONES. Witnesses:

G. V. Swanson, E. L. BUCHANAN.

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